PTFE (PFOA Free) Suture Minimal memory, No tangle, and Superior handling. Biotex™ Non-Resorbable PTFE Suture is comprised of a single-arm, non-resorbable monofilament suture with a stainless-steel surgical needle connected to the suture. The suture is uncoated, undyed and sterile for single use only, composed of 100% PTFE. 3/8, 13mm